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Akfix

Akfix 840 Fire Block Spray Foam (1x12 Oz.)- Orange Color Fire Retardant Polyurethane Expanding Foam for Gap Filling, Insulation and Sealing on Window and Door, Fire Rated, Paintable | 12 Oz. 1 Pack

  • Based on 479 reviews
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Availability: In Stock.
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Arrives Monday, Dec 22
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Size: 1 Pack


Style: Fire Block 12oz


Features

  • High Expansion for Wide Gap Filling: Effectively expands to fill large gaps and cavities, ensuring excellent coverage with minimal product use. Perfect for sealing around door and window frames, electrical fixtures, pipe inlets, and wall penetrations.
  • Strong Bonding to Various Surfaces: Delivers superior adhesion to materials like wood, concrete, metal, and more for lasting results.
  • Paintable Finish for Outdoor Durability: Once cured, the foam can be painted or coated to enhance UV resistance and blend seamlessly with surroundings.
  • Class-A Fire Rated for Enhanced Safety: Akfix Fire Block offers superior fire resistance with a Class A fire rating, ensuring safer residential, commercial, and industrial applications. This UL-certified and ICC-approved product delivers enhanced protection and reliable performance across a wide range of environments.

Material: Polyurethane Foam


Brand: Akfix


Recommended Uses For Product: Thermal Insulation, Sound Insulation, Fire Resistance


Manufacturer: Akfix


Package Dimensions ‏ : ‎ 8.7 x 3.03 x 2.76 inches; 15.2 ounces


Item model number ‏ : ‎ 840


Date First Available ‏ : ‎ April 1, 2024


Manufacturer ‏ : ‎ Akfix


Best Sellers Rank: #2,409 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #9 in Urethane Adhesives


#9 in Urethane Adhesives:


Customer Reviews: 4.2 4.2 out of 5 stars 479 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Dec 22

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • small gaps in a bulkhead
Worked perfectly sealing up a few small gaps in a bulkhead above the waterline.
Reviewed in the United States on November 2, 2025 by Kip ALLEN
    • Use gloves and eye protection!
Works great for filling big gaps!
Reviewed in the United States on November 5, 2025 by Sean M. Roe
    • Christmas craft gold
Christmas craft gold. I have made many very cute crafts
Reviewed in the United States on October 28, 2025 by Kahlonipop
    • color
Size: 12 Pack Style: Black Foam 12oz
On time and works. The color may be closer to a dark grey than black. Still worked fine.
Reviewed in the United States on October 19, 2025 by Robert A Dee Jr.
    • Zero stars.
Zero stars. 4 cans expanded to about a foot by a foot. 2 cans were dried out and we had to punch a hole in the top to get them to work. Not worth your money at all! Tried the zero star and it wouldn’t let me post the review.
Reviewed in the United States on October 30, 2025 by Mandy Duncan
    • Funciona perfectamente
Review Image by Daniel camilo Daniel camilo
Un producto espectacular, lo volveria a comprar una y mil veces.
Reviewed in the United States on October 26, 2025 by Daniel camilo Daniel camilo
    • Predictable expansion, reliable texture, easy to work with
Size: 2 Pack Style: Fire Block 12oz
The ONLY downside to this spray foam is the capacity of the 12oz can, I didn't realize the size until after I'd placed the order. The Akfix foam seems to work very well. Filled many holes in our basement's foam board insulation with one half-can. The foam expands nicely and adheres really well even on old surfaces. Texture when spraying out is smooth, not overwhelmingly gummy or sticky which is great to work with. Expansion happens within the first minute or so and it doesn't continue after that, perfect for my needs... Was able to smooth some areas down with a flat tool before the foam "set" when I didn't want it to protrude beyond a set limit. Just bought a few more cans in the 24oz size because there's more work to do! Would recommend this brand, good stuff. ... show more
Reviewed in the United States on August 7, 2025 by Mel
    • Just buy Great Stuff
With this order I tried several different brands. Sad to report that this one was the worst :-/. Least about (volume packed in can) and least expansive. The greatest stuff was... "Great Stuff". I know, probably sounds silly yep, it was the best of all and much better that this one :-/
Reviewed in the United States on November 5, 2025 by mikes

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